Troy-Bilt ZT50 Operators Manual

Safe Operation Practices • Set-Up • Operation • Maintenance • Service • Troubleshooting • Warranty

Op e r a t O r ’s Ma n u a l

RZT Series Tractor — Model ZT50

WARNING

READ AND FOLLOW ALL SAFETY RULES AND INSTRUCTIONS IN THIS MANUAL

BEFORE ATTEMPTING TO OPERATE THIS MACHINE.

FAILURE TO COMPLY WITH THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY.

P. O. Box 1386 KITCHENER, ONTARIO, CANADA N2G 4J1

Printed In USA

769-04728A

(0 1. 6 .10 )

To The Owner

Thank You

Thank you for purchasing your new equipment. It was carefully
engineered to provide excellent performance when properly
operated and maintained.

Please read this entire manual prior to operating the equipment.

It instructs you how to safely and easily set up, operate and

maintain your machine. Please be sure that you, and any other

persons who will operate the machine, carefully follow the
recommended safety practices at all times. Failure to do so could
result in personal injury or property damage.

All information in this manual is relative to the most recent

product information available at the time of printing. Review
this manual frequently to familiarize yourself with the machine,

its features and operation. Please be aware that this Operator’s

Manual may cover a range of product specifications for
various models. Characteristics and features discussed and/or
illustrated in this manual may not be applicable to all models.

Table of Contents

1

The manufacturer reserves the right to change product
specifications, designs and equipment without notice and
without incurring obligation.

If you have any problems or questions concerning the machine,
phone your local service dealer or contact us directly. Customer
Support telephone numbers, website address and mailing
address can be found on this page. We want to ensure your
complete satisfaction at all times.

Throughout this manual, all references to right and left side of the
machine are observed from the operating position.

The engine manufacturer is responsible for all engine-related
issues with regards to performance, power-rating, specifications,

warranty and service. Please refer to the engine manufacturer’s
Owner’s/Operator’s Manual, packed separately with your

machine, for more information.

Safe Operation Practices ........................................ 3

Assembly & Set Up ................................................... 9

Controls & Features ................................................12

Operation ................................................................15

Maintenance & Adjustment................................. 22

Service .................................................................... 29

Record Product Information

Before setting up and operating your new equipment, please
locate the model plate on the equipment and record the
information in the provided area to the right. You can locate the

model plate under the operator’s seat. Flip the seat forward to

view the model plate. This information will be necessary, should
you seek technical support via our web site or with your local
dealer.

Customer Support

Please do

NOT

return the unit to the retailer from which it was purchased, without first contacting Customer Support.

Accessories ............................................................. 35

Troubleshooting .................................................... 36

Replacement Parts ................................................ 38

Emissions Control Warranty Statement .............. 40

Warranty ................................................................ 42

MO d e l nu M b e r

se r i a l nu M b e r

If you have difficulty assembling this product or have any questions regarding the controls, operation, or maintenance of
this machine, you can seek help from the experts. Choose from the options below:

Visit our web at www.troybilt.ca◊

Locate your nearest dealer from Customer Support: 1-800-668-1238◊

Contact Troy Bilt • P.O. Box 1386 • 97 Kent Avenue • Kitchener, Ontario, Canada • N2G 4J1◊

2

Important Safe Operation Practices

WARNING! This symbol points out important safety instructions which, if not followed,

could endanger the personal safety and/or property of yourself and others. Read and follow
all instructions in this manual before attempting to operate this machine. Failure to comply
with these instructions may result in personal injury.
When you see this symbol. HEED ITS WARNING!

DANGER! This machine was built to be operated according to the safe operation practices in

this manual. As with any type of power equipment, carelessness or error on the part of the

operator can result in serious injury. This machine is capable of amputating hands and feet
and throwing objects. Failure to observe the following safety instructions could result in
serious injury or death.

2

General Operation

Read, understand, and follow all instructions on the 1.
machine and in the manual(s) before attempting to

assemble and operate. Keep this manual in a safe place for

future and regular reference and for ordering replacement
parts.

Be familiar with all controls and their proper operation. 2.

Know how to stop the machine and disengage them

quickly.

Never allow children under 14 years of age to operate this 3.
machine. Children 14 and over should read and understand

the instructions and safe operation practices in this manual
and on the machine and should be trained and supervised
by an adult.

Never allow adults to operate this machine without proper 4.

instruction.
To help avoid blade contact or a thrown object injury, 5.

keep bystanders, helpers, children and pets at least 75 feet

from the machine while it is in operation. Stop machine if
anyone enters the area.

Thoroughly inspect the area where the equipment is to be 6.
used. Remove all stones, sticks, wire, bones, toys, and other
foreign objects which could be picked up and thrown by
the blade(s). Thrown objects can cause serious personal
injury.

Plan your mowing pattern to avoid discharge of material 7.
toward roads, sidewalks, bystanders and the like. Also,

avoid discharging material against a wall or obstruction
which may cause discharged material to ricochet back
toward the operator.

Always wear safety glasses or safety goggles during 8.
operation and while performing an adjustment or repair
to protect your eyes. Thrown objects which ricochet can
cause serious injury to the eyes.

Wear sturdy, rough-soled work shoes and close-fitting 9.
slacks and shirts. Loose fitting clothes and jewelry can be

caught in movable parts. Never operate this machine in

bare feet or sandals.
Be aware of the mower and attachment discharge direction 10.

and do not point it at anyone. Do not operate the mower
without the discharge cover or entire grass catcher in its
proper place.

Do not put hands or feet near rotating parts or under the 11.
cutting deck. Contact with the blade(s) can amputate
hands and feet.

A missing or damaged discharge cover can cause blade 12.
contact or thrown object injuries.

Stop the blade(s) when crossing gravel drives, walks, or 13.
roads and while not cutting grass.

Watch for traffic when operating near or crossing 14.
roadways. This machine is not intended for use on any
public roadway.

Do not operate the machine while under the influence of 15.
alcohol or drugs.

Mow only in daylight or good artificial light.16.

Never carry passengers.17.

Disengage blade(s) before shifting into reverse. Back up 18.

slowly. Always look down and behind before and while

backing to avoid a back-over accident.

Slow down before turning. Operate the machine smoothly. 19.
Avoid erratic operation and excessive speed.

Disengage blade(s), set parking brake, stop engine and 20.
wait until the blade(s) come to a complete stop before
removing grass catcher, emptying grass, unclogging chute,
removing any grass or debris, or making any adjustments.

Never leave a running machine unattended. Always turn 21.
off blade(s), place transmission in neutral, set parking
brake, stop engine and remove key before dismounting.

3

Use extra care when loading or unloading the machine into 22.
a trailer or truck. This machine should not be driven up or
down ramp(s), because the machine could tip over, causing
serious personal injury. The machine must be pushed
manually on ramp(s) to load or unload properly.

Muffler and engine become hot and can cause a burn. Do 23.
not touch.

Check overhead clearances carefully before driving under 24.
low hanging tree branches, wires, door openings etc.,
where the operator may be struck or pulled from the
machine, which could result in serious injury.

Disengage all attachment clutches, depress the brake 25.
pedal completely and shift into neutral before attempting
to start engine.

Your machine is designed to cut normal residential grass of 26.
a height no more than 10”. Do not attempt to mow through
unusually tall, dry grass (e.g., pasture) or piles of dry leaves.
Dry grass or leaves may contact the engine exhaust and/or
build up on the mower deck presenting a potential fire
hazard.

Use only accessories and attachments approved for this 27.
machine by the machine manufacturer. Read, understand
and follow all instructions provided with the approved
accessory or attachment.

Data indicates that operators, age 60 years and above, are 28.
involved in a large percentage of riding mower-related
injuries. These operators should evaluate their ability
to operate the riding mower safely enough to protect
themselves and others from serious injury.

If situations occur which are not covered in this manual, use 29.
care and good judgment. Contact your customer service
representative for assistance.

Slope Operation

Slopes are a major factor related to loss of control and tip-over

accidents which can result in severe injury or death. All slopes

require extra caution. If you cannot back up the slope or if you
feel uneasy on it, do not mow it.

For your safety, use the slope gauge included as part of this
manual to measure slopes before operating this machine on
a sloped or hilly area. If the slope is greater than 15 degrees as
shown on the slope gauge, do not operate this machine on that
area or serious injury could result.

Do:

Mow up and down slopes, not across. Exercise extreme 1.
caution when changing direction on slopes.

Watch for holes, ruts, bumps, rocks, or other hidden 2.
objects. Uneven terrain could overturn the machine. Tall
grass can hide obstacles.

Use slow speed. Choose a low enough speed setting so 3.
that you will not have to stop or shift while on the slope.
Tires may lose traction on slopes even though the brakes

are functioning properly. Always keep machine in gear

when going down slopes to take advantage of engine
braking action.

Follow the manufacturer’s recommendations for wheel 4.

weights or counterweights to improve stability.
Use extra care with grass catchers or other attachments. 5.

These can change the stability of the machine.
Keep all movement on the slopes slow and gradual. Do 6.

not make sudden changes in speed or direction. Rapid
engagement or braking could cause the front of the
machine to lift and rapidly flip over backwards which could
cause serious injury.

Do Not:

Do not turn on slopes unless necessary; then, turn slowly 1.
and gradually downhill, if possible.

Do not mow near drop-offs, ditches or embankments. The 2.
mower could suddenly turn over if a wheel is over the edge
of a cliff, ditch, or if an edge caves in.

Do not try to stabilize the machine by putting your foot on 3.
the ground.

Do not use a grass catcher on steep slopes. 4.
Do not mow on wet grass. Reduced traction could cause 5.

sliding.
Do not tow heavy pull behind attachments (e.g. loaded 6.

dump cart, lawn roller, etc.) on slopes greater than 5
degrees. When going down hill, the extra weight tends
to push the tractor and may cause you to loose control
(e.g. tractor may speed up, braking and steering ability are
reduced, attachment may jack-knife and cause tractor to
overturn).

4 se c t i O n 2 — iM p O r t a n t sa f e Op e r a t i O n pr a c t i c e s

Children

Tragic accidents can occur if the operator is not alert to the 1.
presence of children. Children are often attracted to the
machine and the mowing activity. They do not understand

the dangers. Never assume that children will remain where

you last saw them.

Keep children out of the mowing area and in a.
watchful care of a responsible adult other than the
operator.

Be alert and turn machine off if a child enters the b.
area.

To avoid back-over accidents, look behind and down c.
for small children.

Never carry children, even with the blade(s) shut off. d.
They may fall off and be seriously injured or interfere
with safe machine operation.

Use extreme care when approaching blind corners, e.
doorways, shrubs, trees or other objects that may
block your vision of a child who may run into the
path of the machine.

Keep children away from hot or running engines. f.
They can suffer burns from a hot muffler.

Remove key when machine is unattended to g.
prevent unauthorized operation.

Never allow children under 14 years of age to operate this 2.
machine. Children 14 and over should read and understand

the instructions and safe operation practices in this manual
and on the machine and should be trained and supervised
by an adult.

Tow in g

Tow only with a machine that has a hitch designed for 1.
towing. Do not attach towed equipment except at the
hitch point.

Follow the manufacturers recommendation for weight 2.
limits for towed equipment and towing on slopes.

Never allow children or others in or on towed equipment.3.
On slopes, the weight of the towed equipment may cause 4.

loss of traction and loss of control.
Travel slowly and allow extra distance to stop.5.
Do not shift to neutral and coast downhill. 6.

Service

Safe Handling of Gasoline:

To avoid personal injury or property damage use extreme 1.
care in handling gasoline. Gasoline is extremely
flammable and the vapors are explosive. Serious
personal injury can occur when gasoline is spilled on
yourself or your clothes which can ignite. Wash your skin
and change clothes immediately.

Use only an approved gasoline container.a.

Never fill containers inside a vehicle or on a truck b.
or trailer bed with a plastic liner. Always place

containers on the ground away from your vehicle
before filling.

When practical, remove gas-powered equipment c.
from the truck or trailer and refuel it on the ground.
If this is not possible, then refuel such equipment on
a trailer with a portable container, rather than from a
gasoline dispenser nozzle.

Keep the nozzle in contact with the rim of the fuel d.
tank or container opening at all times until fueling is
complete. Do not use a nozzle lock-open device.

Extinguish all cigarettes, cigars, pipes and other e.
sources of ignition.

Never fuel machine indoors.f.
Never remove gas cap or add fuel while the engine g.

is hot or running. Allow engine to cool at least two

minutes before refueling.
Never over fill fuel tank. Fill tank to no more than ½ h.

inch below bottom of filler neck to allow space for
fuel expansion.

Replace gasoline cap and tighten securely.i.
If gasoline is spilled, wipe it off the engine and j.

equipment. Move machine to another area. Wait 5
minutes before starting the engine.

To reduce fire hazards, keep machine free of grass, k.
leaves, or other debris build-up. Clean up oil or fuel
spillage and remove any fuel soaked debris.

Never store the machine or fuel container inside l.
where there is an open flame, spark or pilot light
as on a water heater, space heater, furnace, clothes
dryer or other gas appliances.

Allow a machine to cool at least five minutes before m.
storing.

General Service

Never run an engine indoors or in a poorly ventilated area. 1.
Engine exhaust contains carbon monoxide, an odorless,
and deadly gas.

Before cleaning, repairing, or inspecting, make certain the 2.
blade(s) and all moving parts have stopped. Disconnect the
spark plug wire and ground against the engine to prevent
unintended starting.

5se c t i O n 2 — iM p O r t a n t sa f e Op e r a t i O n pr a c t i c e s

Periodically check to make sure the blades come to 3.
complete stop within approximately (5) five seconds after
operating the blade disengagement control. If the blades
do not stop within the this time frame, your machine
should be serviced professionally by an authorized Service
Dealer.

Check brake operation frequently as it is subjected to wear 4.

during normal operation. Adjust and service as required.

Check the blade(s) and engine mounting bolts at frequent 5.

intervals for proper tightness. Also, visually inspect blade(s)

for damage (e.g., excessive wear, bent, cracked). Replace

the blade(s) with the original equipment manufacturer’s
(O.E.M.) blade(s) only, listed in this manual. “Use of parts

which do not meet the original equipment specifications
may lead to improper performance and compromise
safety!”

Mower blades are sharp. Wrap the blade or wear gloves, 6.
and use extra caution when servicing them.

Keep all nuts, bolts, and screws tight to be sure the 7.

equipment is in safe working condition.
Never tamper with the safety interlock system or other 8.

safety devices. Check their proper operation regularly.

After striking a foreign object, stop the engine, disconnect 9.

the spark plug wire(s) and ground against the engine.
Thoroughly inspect the machine for any damage. Repair
the damage before starting and operating.

Never attempt to make adjustments or repairs to the 10.
machine while the engine is running.

Grass catcher components and the discharge cover are 11 .
subject to wear and damage which could expose moving
parts or allow objects to be thrown. For safety protection,
frequently check components and replace immediately

with original equipment manufacturer’s (O.E.M.) parts only,
listed in this manual. “Use of parts which do not meet the

original equipment specifications may lead to improper
performance and compromise safety!”

Do not change the engine governor settings or over-speed 12.
the engine. The governor controls the maximum safe
operating speed of the engine.

Maintain or replace safety and instruction labels, as 13.
necessary.

Observe proper disposal laws and regulations for gas, oil, 14.

etc. to protect the environment.

According to the Consumer Products Safety Commission 15.
(CPSC) and the U.S. Environmental Protection Agency (EPA),
this product has an Average Useful Life of seven (7) years,
or 270 hours of operation. At the end of the Average Useful

Life have the machine inspected annually by an authorized
service dealer to ensure that all mechanical and safety
systems are working properly and not worn excessively.
Failure to do so can result in accidents, injuries or death.

Do not modify engine

To avoid serious injury or death, do not modify engine in any
way. Tampering with the governor setting can lead to a runaway

engine and cause it to operate at unsafe speeds. Never tamper

with factory setting of engine governor.

Notice Regarding Emissions

Engines which are certified to comply with California and federal

EPA emission regulations for SORE (Small Off Road Equipment)

are certified to operate on regular unleaded gasoline, and
may include the following emission control systems: Engine

Modification (EM), Oxidizing Catalyst (OC), Secondary Air
Injection (SAI) and Three Way Catalyst (TWC) if so equipped.

Spark Arrestor

WARNING! This machine is equipped with an

internal combustion engine and should not be used
on or near any unimproved forest-covered,
brushcovered or grass-covered land unless the

engine’s exhaust system is equipped with a spark

arrester meeting applicable local or state laws (if
any).

If a spark arrester is used, it should be maintained in effective
working order by the operator.

A spark arrester for the muffler is available through your nearest

engine authorized service dealer.

WARNING! Your Responsibility—Restrict the use of this power machine to persons who read, understand and

follow the warnings and instructions in this manual and on the machine.

6 se c t i O n 2 — iM p O r t a n t sa f e Op e r a t i O n pr a c t i c e s

SAVE THESE INSTRUCTIONS!

Safety Symbols

This page depicts and describes safety symbols that may appear on this product. Read, understand, and follow all instructions on the
machine before attempting to assemble and operate.

Symbol Description

READ THE OPERATOR’S MANUAL(S)
Read, understand, and follow all instructions in the manual(s) before attempting to
assemble and operate

WARNING— ROTATING BLADES
Do not put hands or feet near rotating parts or under the cutting deck. Contact with the
blade(s) can amputate hands and feet.

WARNING—THROWN OBJECTS
This machine may pick up and throw and objects which can cause serious personal injury.

WARNING—THROWN OBJECTS
This machine may pick up and throw and objects which can cause serious personal injury.

BY STA ND ERS
Keep bystanders, helpers, children and pets at least 75 feet from the machine while it is in

operation.

WARNING— SLOPE OPERATION
Do not operate this machine on a slope greater than 15 degrees.

DANGER — ROTATING BLADES
To reduce the risk of injury, keep hands and feet away. Do not operate unless discharge cover
or grass catcher is in its proper place. If damaged, replace immediately.

7se c t i O n 2 — iM p O r t a n t sa f e Op e r a t i O n pr a c t i c e s

Sight and hold this level with a vertical tree...

or a corner of a building...

or a fence post

Fold along dotted line (represents a 15° slope)

15°

8 se c t i O n 2 — iM p O r t a n t sa f e Op e r a t i O n pr a c t i c e s

WARNING! Do not operate your lawn mower on such slopes. Do not mow on inclines with a slope in excess of 15 degrees

(a rise of approximately 2-1/2 feet every 10 feet). A riding mower could overturn and cause serious injury. Operate riding

mowers up and down slopes, never across the face of slopes.

Use this page as a guide to determine slopes where you may not operate safely.

Pull Out Bypass

Rod Then Lower

Into Slot

Keyhole Slot

RH Transmission

Bypass Rod

Wire Harness

Seat Pan

Shoulder

Bolt

Lock
Nuts

Shoulder

Bolt

Wire Harness

Seat Bracket

Shoulder

Bolts

Lock
Nuts

Assembly & Set-Up

Contents of Crate

3

One Lawn Tractor• One Oil Drain Hose (If Equipped)•

One RZT Tractor Operator’s •

Manual

NOTE: This Operator’s Manual covers several models. Tractor
features may vary by model. Not all features in this manual are

applicable to all tractor models and the tractor depicted may
differ from yours.

One Engine Operator’s Manual•

Tractor Preparation

Remove the upper crating material from the shipping pallet, and
cut any bands or tie straps securing the tractor to the pallet.

Use the lift handle to raise the deck to its highest position.
Engage the transmission bypass rods on each side of the
tractor; then carefully roll the tractor off the shipping pallet.

The transmission bypass rods (one for each the RH and LH

transmission) are located beneath the frame platform, just inside
each rear wheel. Disengage the bypass rods. See Figure 3-1.

One Deck Wash Hose Coupler •

Remove the two shoulder bolts and lock nuts in the seat 2.
pan as shown in Figure 3-2.

Figure 3-1

Remove the deck wash system nozzle adapter and oil drain tube
from the manual bag and store for future use.

Install Operator’s Seat

To install the seat proceed as follows:
NOTE: The seat is shipped with the seat switch and seat pan

attached.

NOTE: Be careful not to cut the wiring harness connecting the
seat and the seat switch.

Cut any straps securing the seat assembly and the drive 1.
control levers to the tractor. Remove any packing material.

Figure 3-2

Rotate the seat into position and secure the seat into place 3.
with the previously removed shoulder bolts and lock nuts.
Be careful not to crimp or damage the wire harness while
installing the seat. See Figure 3-3.

Figure 3-3

9

Position Drive Control levers

Control Lever

Flange

Lock Nut

Slotted Hole

Washer

Hex Screw

Lift Control

Lever Upward

Pivot

Bracket

The drive control levers of the tractor are lowered for shipping
purposes. The flange lock nuts, hex screws, and flat washers that
normally secure the control levers in their operating position
are unfastened and installed in the slotted holes of the control
levers for shipment. The control levers must be repositioned to
operate the tractor. To reposition the control levers for operation,
proceed as follows:

Remove the hex screw, flat washer, and flange lock nut 1.
from the slot of one of the drive control levers.

Lift and swing that control lever upward until the slotted 2.
hole in the lever bracket aligns with one of the holes in the

pivot bracket. See Figure 3-4.

Connecting the Battery Cables

CALIFORNIA PROPOSITION 65 WARNING!

Battery posts, terminals, and related accessories
contain lead and lead compounds, chemicals
known to the State of California to cause cancer and
reproductive harm. Wash hands after handling.

CAUTION: When attaching battery cables, always

connect the POSITIVE (Red) wire to its terminal first,
followed by the NEGATIVE (Black) wire.

For shipping reasons, both battery cables on your equipment
may have been left disconnected from the terminals at the
factory. To connect the battery cables, proceed as follows:

NOTE: The positive battery terminal is marked Pos. (+). The
negative battery terminal is marked Neg. (–).

Remove the plastic cover, if present, from the positive 1.
battery terminal and attach the red cable to the positive

battery terminal (+) with the bolt and hex nut. See Figure

3-5.

Figure 3-4

Slide the flat washer onto the hex screw. From the outside, 3.
insert the hex screw with washer through the control lever
slot and the hole of the pivot bracket. Secure with the

flange lock nut. See Figure 3-4.
Note the relative position of the control lever to the pivot 4.

bracket, then repeat the previous steps to reposition the
other control lever in approximately the same position.

Refer to “Adjusting the Drive Control Levers” in the 5.
Maintenance & Adjustments section for instructions on the

final adjustment of the levers.

Figure 3-5

Remove the plastic cover, if present, from the negative 2.
battery terminal and attach the black cable to the negative

battery terminal (–) with the bolt and hex nut. See Figure

3-5.
Position the red rubber boot over the positive battery 3.

terminal to help protect it from corrosion.

NOTE: If the battery is put into service after the date shown
on top/side of battery, charge the battery as instructed in the

Maintenance section your Operator’s Manual prior to operating

the tractor.

10 se c t i O n 2— as s e M b l y & se t -up

Lower Deck Discharge Chute Deflector

Shipping

Brace

WARNING! Never operate the mower deck without

the chute deflector installed and in the down

position.

Check the mower deck for a shipping brace (with tag) that may
be holding the chute deflector upward for shipment. If a brace
is present, it must be removed before operating the tractor.

Holding the chute deflector fully upward, remove the shipping

brace by grasping it and rotating it clockwise. Lower the chute
deflector. See Figure 3-6.

Figure 3-6

11se c t i O n 2 — as s e M b l y & se t -up

Parking Brake

Deck Height

Index

Deck Lift

Handle

RH Drive

Control Lever

LH Drive

Control Lever

Seat Adjustment Lever

Hour Meter/

Indicator Panel

Fuel Tank Cap

Ignition Switch

PTO Switch

Throttle/Choke

Control

Cup Holder

Storage Tray

CUTTING

HEIGHT

Controls and Features

4

NOTE: This Operator’s Manual covers several models. Tractor
features may vary by model. Not all features in this manual are
applicable to all tractor models and the tractor depicted may
differ from yours.

NOTE: References to LEFT, RIGHT, FRONT, and REAR indicate that
position on the tractor when facing forward while seated in the
operator’s seat.

RH and LH Drive Control Levers

The RH and LH control levers are located on each side of the
operator’s seat. These hinged levers pivot outward to open
space to permit the operator to either sit in the tractor seat, or to
dismount the tractor. The levers must be fully opened out and in
the neutral position to start the tractor engine.

Each lever controls the respective RH or LH transmission.
Consequently, these levers control all of the movements of the
tractor. Driving and steering utilizing these control levers is
quite different from conventional tractors, and will take some
practice to master. Refer to Operation for instructions on using
the control levers.

Figure 4-1

Deck Height Index

The deck height index consists of six index notches located
on the front/right of the seat box frame. Each notch
corresponds to a ⁄” change in the deck height position
ranging from 1-⁄” at the lowest notch to 4” at the highest
notch.

Deck Lift Handle

The deck lift handle is located on the front/right of the seat
box frame, and is used to raise and lower the mower deck.

Pull the handle to the left out of the index notch and push
downward to lower the deck, or pull upward to raise the
deck. When the desired height is attained, move the lift
handle to the right until fully in the index notch.

12

Ignition Switch

HOURS 1/10

PTO

/

B

L

A

D

E

PA

R

K

B

R

A

K

E

O

I

L

BATT.

The ignition switch is located on the RH console
to the right of the operator’s seat. The ignition

switch has three positions as follows:

OFF - The engine and electrical system is

turned off.

ON - The tractor electrical system is energized.
START - The starter motor will turn over the engine. Release the

key immediately when the engine starts
NOTE: To prevent accidental starting and/or battery discharge,

remove the key from the ignition switch when the tractor is not
in use.

Power Take-Off (PTO) Switch

The PTO switch is located on the RH console to
the right of the operator’s seat.

The PTO switch operates the electric PTO

clutch mounted on the bottom of the engine

crankshaft. Pull the switch knob upward to
engage the PTO clutch, or push the knob

downward to disengage the clutch.

The PTO switch must be in the “disengaged”

position when starting the engine.

Transmission Bypass Rods (Not Visible)

The transmission bypass rods (one for each the RH and LH

transmission) are located beneath the frame platform, just inside
each rear wheel.

When engaged, the two rods open a bypass within the
hydrostatic transmissions, which allows the tractor to be pushed

short distances by hand. Refer to Maintenance & Adjustments for

instructions on using the bypass feature.

CAUTION: Never tow your tractor. Towing the

tractor with the rear wheels on the ground may
cause severe damage to the transmissions.

Do not attempt to remove the cap from the tractor.

Push the cap downward on the fuel tank fill neck and turn

approximately ⁄ turn clockwise to tighten Always re-install the
fuel cap tightly onto the fuel tank after removing.

WARNING! Never fill the fuel tank when the engine

is running. If the engine is hot from recently running,
allow to cool for several minutes before refueling.

Highly flammable gasoline could splash onto the

engine and cause a fire.

Hour Meter/Indicator Panel

The hour meter/indicator panel is

located on the LH console to the left of
the operator’s seat.

Hour Meter Features

The hour meter records the hours that
the tractor has been operated in the
digital display (tenths of an hour - right
most digit).

NOTE: The hour meter is activated whenever the ignition switch

is turned to the “ON” position. Keep a record of the actual hours

of operation to assure all maintenance procedures are completed
according to the instructions in this manual and the engine
manual.

When key is turned to the “ON” position, the battery indicator

light briefly illuminates and the battery voltage is briefly
displayed. The display then changes to the accumulated hours.

The Indicator Monitor will also remind the operator of
maintenance intervals for changing the engine oil. The LCD

will alternately flash, “CHG” ; “OIL” and the recorded hours for

five minutes after every 50 hours of recorded operation. The
maintenance interval lasts for two hours (from 50-52, 100-102,
150-152, etc.). The LCD will flash as described for five minutes

every time the tractor’s engine is started during this maintenance

interval. Follow the oil change intervals provided in the engine
manual.

Cup Holder

The cup holder is located toward the rear of the RH console to
the right of the operator’s seat.

Storage Tray

The storage tray is located at the rear of the RH console.

Seat Adjustment Lever (Not Seen)

The seat adjustment lever is located below the front/left of the
seat. The lever allows for adjustment of the fore to aft position

of the operator’s seat. Refer to Maintenance & Adjustments for

instructions on adjusting the seat position.

Fuel Tank Cap

The fuel tank cap is located near the middle of the LH console.

Turn the fill cap approximately ⁄ turn and pull upward to
remove. The fuel cap is tethered to the tractor to prevent its loss.

13se c t i O n 4 — cO n t r O l s a n d fe a t u r e s

Indicator Panel Features

This symbol indicates the

This symbol indicates the

fast position.

slow position.

CHOKE

This symbol indicates the
choke position.

ZT42

This symbol indicates the

This symbol indicates the

fast position.

slow position.

ZT50

Battery Indicator

Illuminates and the battery voltage is displayed briefly when the

ignition switch it turned to the “ON” position.

Illuminates to indicate the battery voltage has dropped below

11.5 (+0.5/-1.0) volts. The battery voltage is also displayed on

the hour meter. If this indicator and display come on during
operation, check the battery and charging system for possible
causes and/or contact your dealer.

Oil Pressure Indicator

This warning lamp indicates low engine oil pressure. If the
indicator comes on while the engine is running, stop the engine
immediately and check for possible causes. Do not run the
engine while this indicator is illuminated. Contact your dealer to
have the tractor and engine inspected.

NOTE: The oil pressure indicator may illuminate when the

ignition switch is in the ON position, but should turn off when

the engine is started.

PTO Engaged Indicator

This indicator illuminates when the PTO switch is pulled upward
in the “ENGAGED” position and the ignition switch is turned
to the “START” position. Check this indicator if the engine will
not crank with the ignition switch in the “START” position. If
necessary, move the PTO switch to the “DISENGAGED” position.

Parking Brake Engaged Indicator

This indicator illuminates when the parking brake is in the

DISENGAGED position and the ignition switch is turned to the
“START” position. Check this indicator if the engine will not crank
with the ignition switch in the “START” position. If necessary,
move the parking brake to the ENGAGED position.

This indicator also illuminates when the ignition switch is turned

to the “START” position and the RH and/or LH drive control levers

are in a position other than the fully out in neutral position. Move
the control levers fully outward.

Throttle/Choke Control

The throttle/choke control is located on the LH console
to the left of the operator’s seat. When set in a given

position, a uniform engine speed will be maintained.

Push the throttle/choke control handle forward to increase

the engine speed. The tractor is designed to operate with the
throttle/choke control in the fast position (full throttle) when the
tractor is being driven and the mower deck is engaged.

Pull the throttle/choke control handle rearward to decrease the

engine speed.
Model ZT42 ONLY — When starting the engine, push the

control handle fully forward into the “CHOKE” position. See
Figurere 8. After starting and warming the engine, move the

control handle rearward until you feel it move past the choke
detent.

Choke Control - Model ZT50 ONLY

The choke knob controls the position of the engine choke. Pull

the knob out to choke the engine; push the knob in to open the
choke.

Parking Brake Engagement Lever

The parking brake engagement lever is located on the
front/left of the seat box frame, and is used to engage the
parking brake.

Pull the lever fully upward and to the left; then lower into
the short “J” slot to engage the brake.

Pull the lever up out of the “J” slot and to the right; then

lower completely to disengage the parking brake.

NOTE: If the LH and RH drive control levers are not fully

opened out in the neutral position when engaging the
parking brake, the engine will stop. The parking brake
must be placed in the engaged position when starting the
tractor engine.

Transmission Oil Expansion Reservoir

The transmission oil expansion reservoir is connected by hoses to

the RH and LH transmission assemblies, and is located beneath

the seat box. The function of the reservoir is to hold the natural
expansion of transmission oil that occurs as the transmission

warms up during operation. DO NOT FILL THE RESERVOIR.

Under normal operating conditions, no oil should be added

to the reservoir. The COLD oil level should be no higher than

approximately ⁄” (the “Full Cold” mark) above the bottom of the
reservoir.

NOTE: Prior to the initial operation of the tractor, the oil level in

the reservoir may be slightly higher than the maximum due to air

in the oil lines. Operation of the tractor will eventually purge the

air from the lines and the oil level will settle to the maximum.

14 se c t i O n 4— cO n t r O l s a n d fe a t u r e s

Operation

5

General Safety

RECEIVE INSTRUCTION — Entirely read this operator’s •
manual. Learn to operate this machine SAFELY. Do not risk
INJURY or DEATH. Allow only those who have become
competent in its usage to operate this tractor.

Before starting the engine or beginning operation, be •
familiar with the controls. The operator should be in the
operator’s seat. The PTO switch must be in the disengaged
position, the parking brake engaged, and the RH and LH
drive control levers moved fully outward in the neutral
position.

Keep all shields in place. Keep away from moving parts.•
NO RIDERS! Keep all people and pets a safe distance away. •

Look behind and down to both sides of the tractor before
and while backing up.

DO NOT direct the mower discharge at people.•
Avoid slopes where possible. Never operate on slopes •

greater than 15°. Slopes with a greater incline present
dangerous operating conditions. Tractors can be rolled
ove r.

Before leaving the operator’s seat: Shut off the PTO, move •
the RH and LH drive control levers fully outward in the
neutral position, engage the parking brake, shut off the
engine and remove the ignition key. Wait for all movement
to stop before servicing or cleaning.

Operate the drive control levers smoothly and avoid •
any sudden movements of the levers when starting and
stopping. Keep a firm grip on the control levers.

Be careful when operating near roadways. Stop the tractor •
motion and wait for vehicles to pass before operating
along the road.

Do not operate the tractor with the mower deck removed. •
Removal of the deck will change the balance of the tractor,
and could contribute to a tractor rollover.

Avoid operation on traction surfaces that are unstable; use •
extreme caution if the surface is slippery.

Slow down before turning and come to a complete stop •
before any zero turn maneuver.

Do not stop the tractor or park the tractor over •
combustible materials such as dry grass, leaves, debris, etc.

Do not fill the fuel tank when the engine is running or •
while the engine is hot. Allow the engine several minutes
to cool before refueling. Tighten the fuel cap securely.

Before Operating Your Tractor

Before you operate the tractor, study this manual carefully •
to familiarize yourself with the operation of all the
instruments and controls. It has been prepared to help you
operate and maintain your tractor efficiently.

This engine is certified to operate only on clean, fresh, •
unleaded regular gasoline. For best results, fill the fuel
tank with only clean, fresh, unleaded gasoline with a pump
sticker octane rating of 87 or higher.

Unleaded gasoline is recommended because it leaves •
less combustion chamber deposits and reduces harmful
exhaust emissions. Leaded gasoline is not recommended
and must not be used where exhaust emissions are
regulated.

NOTE: Purchase gasoline in small quantities. Do not use
gasoline left over from the previous season, to minimize
gum deposits in the fuel system.

Gasohol (up to 10% ethyl alcohol, 90% unleaded gasoline •
by volume) is an approved fuel. Other gasoline/alcohol
blends are not approved.

Methyl Tertiary Butyl Ether (MTBE) and unleaded gasoline •
blends (up to a maximum of 15% MTBE by volume) are
approved fuels. Other gasoline/ether blends are not
approved.

Check the engine oil level.•
Clean the air cleaner element if necessary.•
Check the tire inflation pressures.•
Adjust the seat for operator’s maximum comfort, visibility •

and for maintaining complete control of the tractor.

Safety Interlock System

This tractor is equipped with a safety interlock system for the
protection of the operator. If the interlock system should ever
malfunction, do not operate the tractor. Contact your authorized
dealer.

The safety interlock system prevents the engine from •
cranking or starting unless the RH and LH drive control
levers are moved fully outward in the neutral position, the
parking brake is engaged, and the PTO is disengaged.

To avoid sudden movement when disengaging the parking •
brake, the safety interlock system will shut off the engine
if the RH and/or LH drive control levers are moved to a
position other than the fully out in the neutral position
when the parking brake is engaged.

The safety interlock system will shut off the engine if the •
operator leaves the seat before engaging the parking
brake.

15

The safety interlock system will shut off the engine if the •

LH Control Lever

Out in Neutral

Parking Brake

RH Control Lever

Out in Neutral

Engaged

ZT42 - Move Throttle

ZT50 - Pull Choke

PTO Switch in Down

(Disengaged) Position

Control to Choke

ZT50 - Move Throttle

Control to "FAST"

operator leaves the seat with the PTO engaged, regardless
of whether the parking brake is engaged.

NOTE: The PTO switch must be moved to the “OFF”
position to restart the engine.

The safety interlock system will shut off the PTO and the •
mower blades will stop if both drive control levers are
moved into the reverse position. The PTO will re-engage
when one or both of the levers are moved back to the
neutral or forward position.

Starting the Engine

WARNING! This tractor is equipped with a safety

interlock system designed for the protection of the
operator. Do not operate the tractor if any part of
the interlock system is malfunctioning. Periodically
check the functions of the interlock system for
proper operation.

WARNING! For personal safety, the operator must

be sitting in the tractor seat when starting the
engine.

crank the engine continuously for more than 5 seconds at a
time. If the engine does not start within this time, turn the
key to “OFF” and wait a minute. Try again after waiting.

After the engine starts, gradually pull the throttle control 3.
lever rearward past the choke detent position to the FAST
position. Do not use the choke to enrich the fuel mixture,
except as necessary to start the engine.

Model ZT50 ONLY

Pull the choke control knob upward to the full choke 1.
position. NOTE: If the engine is warmed up, it may not be
necessary to choke the engine.

Move the throttle control lever fully forward to the “fast” 2.
position.

Turn the ignition key clockwise to the “START” position 3.
and release it as soon as the engine starts; however, do not
crank the engine continuously for more than 5 seconds at a
time. If the engine does not start within this time, turn the
key to “OFF” and wait a minute to allow the engine’s starter
motor to cool. Try again after waiting.

As the engine warms up, gradually push the choke knob 4.
downward to open the choke. Do not use the choke to
enrich the fuel mixture, except as necessary to start the
engine.

Allow the engine to run for a few minutes at mid throttle •
before putting the engine under load.

Observe the hour meter / indicator panel. If the battery •
indicator light comes on, immediately stop the engine.
Have the tractor inspected by your dealer.

Model ZT42 ONLY

Figure 5-1

Operator must be sitting in the tractor seat.•
Engage the parking brake. Refer to Figure 5-1.•
Make certain the PTO switch is in the disengaged (down) •

position. Refer to Figure 5-1.

Move the throttle control lever fully forward into the 1.
“CHOKE” position. NOTE: If the engine is warmed up, it may
not be necessary to place the throttle control in the choke
position.

Turn the ignition key clockwise to the “START” position 2.
and release it as soon as the engine starts; however, do not

Cold Weather Starting

When starting the engine at temperatures near or below
freezing, ensure the correct viscosity motor oil is used in the
engine and the battery is fully charged. Start the engine as
follows:

Be sure the battery is in good condition. A warm battery 1.
has much more starting capacity than a cold battery.

Use fresh winter grade fuel. Winter grade gasoline has 2.
higher volatility to improve starting. Do not use gasoline
left over from summer.

Follow the previous instruction for Starting the Engine.3.

Using Jumper Cables To Start Engine

WARNING! Batteries contain sulfuric acid and

produce explosive gasses. Make certain the area is
well ventilated, wear gloves and eye protection, and
avoid sparks or flames near the battery.

If the battery charge is not sufficient to crank the engine,
recharge the battery. If a battery charger is unavailable and
the tractor must be started, the aid of a booster battery will be
necessary. Connect the booster battery as follows:

Connect the end of one cable to the disabled tractor 1.
battery’s positive terminal; then connect the other end of
that cable to the booster battery’s positive terminal.

16 se c t i O n 5— Op e r a t i O n

Connect one end of the other cable to the booster 2.

Control Lever Moved

Inward and in Neutral

battery’s negative terminal; then connect the other end of
that cable to the frame of the disabled tractor, as far from
the battery as possible.

Start the disabled tractor following the normal starting 3.
instructions previously provided; then disconnect
the jumper cables in the exact reverse order of their
connection.

Have the tractor’s electrical system checked and repaired 4.
as soon as possible to eliminate the need for jump starting.

Stopping the Engine

Place the PTO switch in the “OFF” position.1.
Move the RH and LH drive control levers fully outward in 2.

the neutral position.
Engage the parking brake. 3.
Move the throttle/choke control to midway between the 4.

SLOW and FAST positions.
Turn the ignition key to the “OFF” position and remove the 5.

key from the ignition switch.

NOTE: Always remove the key from the ignition switch to prevent
accidental starting or battery discharge if the equipment is left
unattended.

Practice Operation (Initial Use)

Operating a zero-turn tractor is not like operating a conventional
type riding tractor. Although and because a zero turn tractor is
more maneuverable, getting used to operating the control levers
takes some practice.

We strongly recommend that you locate a reasonably large,
level and open “practice area” where there are no obstructions,
pedestrians, or animals. You should practice operating the
tractor for a minimum of 30 minutes.

Carefully move (or have moved) the tractor to the practice area.
When performing the practice session, the PTO should not be
engaged. While practicing, operate the tractor at approximately
⁄-⁄ throttle and at less than full speed in both forward and
reverse.

Carefully practice maneuvering the tractor using the instructions
in the following section “Driving the Tractor.” Practice until you
are confident that you can safely operate the tractor.

Driving the Tractor

Move the RH and LH drive control levers inward in the 3.
neutral position. Refer to Figure 5-2.

Figure 5-2

NOTE: If the control levers are not even in the neutral position,
refer to Maintenance & Adjustments for instructions to adjust the
levers so that they are even.

Move the throttle/choke control lever forward to the full 4.
throttle position (3300-3500 RPM).

NOTE: Although the tractor’s engine is designed to run at
full throttle, when performing a practice session the tractor
must be operated at less than full throttle (approximately
2500-3000 RPM). This only applies to practice.

NOTE: For Model ZT42, make certain the throttle control
has not been moved too far forward into the “Choke”
position.

WARNING! Always maintain a firm grip on the

control levers. DO NOT release the control levers to
slow or stop the tractor; move levers to neutral
position using your hands.

To drive the tractor, firmly grasp the respective drive 5.
control levers with your right and left hands and continue
with Driving the Tractor Forward on the following page.

WARNING! Avoid sudden starts, excessive speed

and sudden stops.

Adjust the operator’s seat to the most comfortable 1.
position that allows you to operate the controls. See seat
adjustment in the Maintenance & Adjustments section.

Release the parking brake.2.

17se c t i O n 5 — Op e r a t i O n

Driving the Tractor Forward

Driving Forward

Neutral

Position

Faster

Slower

Forward Left Turn

Forward Right Turn

WARNING! Keep all movement of the drive control

levers slow and smooth. Abrupt movement of the
control levers can affect the stability of the tractor
and could cause the tractor to flip over, which may
result in serious injury or death to the operator.

Slowly and evenly move both drive control levers forward. 1.
The tractor will start to move forward. See Figure 5-3.

To turn to the left, move the left drive control lever 1.
rearward of the right lever. See Figure 5-4.

Figure 5-4

To turn to the right, move the right drive control lever 2.
rearward of the left lever. See Figure 5-5.

Turning the Tractor While Driving Forward

To turn the tractor while driving forward, move the control
levers as necessary so that one lever is rearward of the other. The
tractor will turn in the direction of the rearward control lever.

Figure 5-3

As the control levers are pushed farther forward the speed 2.
of the tractor will increase.

To slow the tractor move the controls lever rearward to 3.
attain the desired speed, or move the levers to the neutral
position to stop the tractor.

WARNING! Always maintain your grasp on the

drive control levers. Do not release the levers to slow
the tractor or to return to neutral.

WARNING! When reversing the direction of travel,

we recommend performing gradual ‘U’ turns where
possible. Sharper turns increase the possibility of
turf defacement, and could affect control of the
tractor. ALWAYS slow the tractor before making
sharp turns.

Figure 5-5

The greater the fore-to-aft distance between the two 3.
levers, the sharper the tractor will turn.

To execute a “pivot turn,” move the turn side drive control 4.
lever to the neutral position, while moving the other
control lever forward.

NOTE: Making a “pivot turn” on grass will greatly increase
the potential for defacement of the turf.

18 se c t i O n 5— Op e r a t i O n

Driving the Tractor In Reverse

Neutral

Position

Slower

Faster

Rearward Left Turn

Rearward Right Turn

WARNING! Always look behind and down on both

sides of the tractor before backing up. Always look
behind while traveling in the reverse direction.

Slowly and evenly move both drive control levers rearward. 1.
The tractor will start to move in the reverse direction. See
Figure 5-6.

Turning While Driving Rearward

To turn the tractor while driving rearward, move the control
levers as necessary so that one lever is forward of the other. The
tractor will turn in the direction of the forward control lever.

To turn to the left while traveling in reverse, move the left 1.
drive control lever forward of the right lever. See Figure 5-7.

Figure 5-6

As the control levers are pushed farther rearward the speed 2.
of the tractor will increase.

To slow the tractor move the controls lever forward to 3.
attain the desired speed, or move the levers to the neutral
position to stop the tractor.

Figure 5-7

To turn to the right while traveling in reverse, move the 2.
right drive control lever forward of the left lever. See Figure
5-8.

Figure 5-8

The greater the fore-to-aft distance between the two 3.
levers, the sharper the tractor will turn.

To execute a “pivot turn,” move the turn side drive control 4.
lever to the neutral position, while moving the other
control lever rearward.

NOTE: Making a “pivot turn” on grass will greatly increase
the potential for defacement of the turf.

19se c t i O n 5 — Op e r a t i O n

Executing a Zero Turn

Clockwise Zero Turn

Counterclockwise

Zero Turn

Stop the forward or reverse motion of the tractor by 1.
moving the two drive control levers to neutral.

To turn clockwise, move the left control lever forward while 2.
simultaneously moving the right control lever rearward.
See Figure 5-9.

To turn counterclockwise, move the right control lever 3.
forward while simultaneously moving the left control lever
rearward. See Figure 5-10.

WARNING! When executing a zero turn, the tractor

MUST BE STOPPED. Executing a zero turn while the
tractor is moving can significantly reduce your
control of the tractor and will cause severe turf
defacement to occur.

Figure 5-9

Stopping the Tractor

Move both drive control levers to the neutral position to 1.
stop the motion of the tractor.

Push the PTO switch downward to the disengaged 2.
position.

Use the deck lift handle to raise the deck to its highest 3.
position.

If dismounting the tractor, move the drive control handles 4.
fully outward in the neutral position, engage the parking
brake, move the throttle/choke control lever to the fast
position, turn the ignition switch to “OFF’” and remove the
key from the switch.

WARNING! Do not leave the seat of the tractor

without disengaging the PTO, moving drive control
levers fully outward in the neutral position, and
engaging the parking brake. If leaving the tractor
unattended, turn the ignition key off and remove
key.

Driving On Slopes

Refer to the slope gauge in the Safe Operation Section to help
determine slopes where you may not operate safely.

WARNING! Do not operate on inclines with a slope

in excess of 15 degrees (a rise of approximately 2-⁄
feet every 10 feet). The tractor could overturn and
cause serious injury.

Always drive across slopes, never up and down. Control 1.
the speed and direction of the tractor using primarily the
control lever on the downhill side of the tractor, with the
uphill control lever remaining essentially in a fixed position.

Avoid turning downhill if possible. Start at the bottom of a 2.
slope and work upward. Always slow down before turning.

Use extra care and go slowly when turning downhill.3.

Operating The PTO

Operate the PTO clutch as follows:

Move the throttle/choke control lever to approximately the 1.
mid throttle position.

Pull the PTO switch upward to the “ENGAGED” position. 2.
Advance the throttle/choke lever to the operating speed 3.

(full engine speed).
The operator must remain in the tractor seat at all times. If 4.

the operator should leave the seat without turning off the
power take-off switch, the tractor’s engine will shut off.

The PTO clutch cannot be operated when the tractor is 5.
driving in the reverse direction. The PTO will disengage
when both drive control levers are moved to the reverse
position, and will re-engage when one (or both) control
lever(s) is moved to the neutral or forward position.

20 se c t i O n 5— Op e r a t i O n

Figure 5-10

Using the Mower Deck

WARNING! Make certain the area to be mowed is

free of debris, sticks, stones, wire or other objects
that can be thrown by the rotating blades.

NOTE: Do not engage the mower deck when lowered in grass.
Premature wear and possible failure of the ‘V” belt and PTO
clutch will result. Fully raise the deck or move to a non grassy
area before engaging the mower deck.

Mow across slopes, not up and down. If mowing a slope, 1.
start at bottom and work upward to ensure turns are made
uphill.

On the first pass pick a point on the opposite side of the 2.
area to be mowed.

Engage the PTO clutch using the PTO switch and move the 3.
throttle/choke control to the fast position.

Lower the mower deck to the desired height setting using 4.
the lift handle.

Slowly and evenly push the RH and LH drive control levers 5.
forward to move the tractor forward, and keep the tractor
headed directly toward the alignment point.

NOTE: The speed of the tractor will affect the quality of
the mower cut. Mowing at full speed will adversely affect
the cut quality. Control the ground speed with the control
levers.

When approaching the other end of the strip, slow down 6.
or stop before turning. A U-turn is recommended unless a
pivot or zero turn is required.

Align the mower with an edge of the mowed strip and 7.
overlap approximately 3”.

Direct the tractor on each subsequent strip to align with a 8.
previously cut strip.

To prevent rutting or grooving of the turf, if possible, 9.
change the direction that the strips are mowed by
approximately 45° for the next and each subsequent
mowing.

WARNING! Be careful when crossing gravel paths

or driveways. Disengage the PTO and raise the deck
to the highest position before crossing.

Checking the Safety Interlock Circuits

Periodically check the safety interlock circuits to ensure they are
working properly. If a safety circuit is not working as designed,
contact you Cub Cadet dealer to have the tractor inspected. DO
NOT operate the tractor if any safety circuit is not functioning
properly. To check the safety circuits, proceed as follows:

Sitting in the tractor seat with both drive control levers 1.
opened fully outward, disengage the parking brake and
momentarily turn the ignition switch to the start position.
The engine should not crank.

Engage the parking brake and pull the PTO switch upward 2.
to the engaged position. Momentarily turn the ignition
switch to the start position; the engine should not crank.

Push the PTO switch downward to the disengaged position 3.
and engage the parking brake. Start the engine and move
one of the drive control levers from the fully outward
neutral position. The engine should stop running. Repeat
the procedure with the opposite control lever.

Move both control levers fully outward in the neutral 4.
position and disengage the parking brake; then lift upward
from the operator’s seat. The engine should stop.

With both control levers fully outward in the neutral 5.
position and the parking brake engaged, engage the PTO.
Lift upward from the operator’s seat; the engine should
stop.

Start the tractor, disengage the parking brake, and move 6.
the control levers inward to the neutral operating position.
Engage the PTO and move both control lever slowly into
the slow reverse position; the PTO should disengage
and the mower deck should stop until one or both of the
control levers is moved to the neutral or forward position.

NOTE: When stopping the tractor for any reason while on a grass
surface, always:

Place the shift lever in neutral, •
Engage the parking brake, •
Shut engine off and remove the key. •
Doing so will minimize the possibility of having your lawn •

‘‘browned’’ by hot exhaust from your tractor’s running
engine.

21se c t i O n 5 — Op e r a t i O n

Maintenance & Adjustments

Maintenance Schedule

6

Check Engine Intake Screen/Cover

Clean Hood/Dash Louvers

Check Engine Oil Level

Check Air Filter for Dirty, Loose or Damaged Parts

Clean and Re-oil Air Filter’s Foam Precleaner

Replace Air Filter Element

Change Engine Oil and Replace Oil Filter

Clean Battery Terminals

Lube Front Pivot Axle and Caster Axles

Clean Engine Cooling Fins

Before

Each use

10 Hours

P

P P
P

Every

Every

25 Hours

Every

50 Hours

Every

100 Hours

Prior

to Storing

P P

P

P

P
P P
P P

P P

Lube Front Deck Wheels

Check Spark Plug Condition & Gap

Replace Fuel Filter

Maintenance

WARNING! Before performing any maintenance or

repairs, disengage the PTO, move the drive control
levers fully outward in the neutral position, engage
the parking brake, stop the engine and remove the
key to prevent unintended starting.

Engine

Refer to the Owner’s Manual for all engine maintenance intervals,
procedures, specifications and instructions.

Changing the Engine Oil

WARNING ! If the engine has been recently run, the

engine, muffler and surrounding metal surfaces will
be hot and can cause burns to the skin. Exercise
caution to avoid burns.

P P

P P
P

To complete an oil change, proceed as follows:

Run the engine for a short time to warm the engine oil. The 1.
oil will flow more freely and carry away more impurities.
Use care to avoid burns from hot oil.

Locate the oil drain hose or the oil-drain valve on the 2.
engine.

NOTE: The 42” RZT’s is equipped with an oil-drain valve on the
right side of the engine. The 50” RZT is equipped with an oil drain
hose and is located on the left side of the engine. The 54” RZT is
equipped with an oil-drain valve located on the left side of the
engine.

22

If you have the 42” or 54” RZT proceed as follows:

Oil Drain Hose

Square-Head

Hose Plug

50” RZT

42” and 54” RZT

Oil Drain Valve

Oil Drain Hose

Pop open the protective cap on the end of the oil drain 1.
valve to expose the drain port. See Fig 6-1.

If you have the 50” RZT proceed as follows:

Route the free end of the oil drain hose toward an 1.
appropriate oil collection container with at least a 2.5 quart
capacity, to collect the used oil. Remove the oil fill cap/
dipstick from the oil fill tube.

While holding the free end of the oil drain hose over the oil 2.
collection container, unscrew the square head hose plug
from the end of the hose. See Figure 6-1. Drain the engine
oil into the collection container.

NOTE: Two adjustable wrenches may be necessary to
remove the square-head hose plug. If so, place one wrench
on the square-head hose and one on the end of the hose
to loosen.

After draining the oil, wipe any residual oil from the oil 3.
drain hose. Thread the square head plug into the drain
hose fitting and fully tighten the plug.

Replace the oil filter, and refill the engine with new oil as 4.
instructed in the Owner’s Manual.

Air Cleaner

Service the pre-cleaner and cartridge/air cleaner element as
instructed in the Owner’s Manual.

Figure 6-1

Remove the oil fill cap/ dipstick from the oil fill tube.2.
Push the oil drain hose (packed with this manual) onto the 3.

oil drain port. Route the opposite end of the hose into an
appropriate oil collection container with at least a 2.5 quart
capacity, to collect the used oil.

The engine is equipped with either a twist-and-pull drain 4.
port or a tabbed drain port. If your engine has the twist­and-pull drain go to step a. If your engine is equipped with
the tabbed drain go to step b.

Turn the oil drain valve a. ⁄-turn, then pull outward to
begin draining oil. After the oil has finished draining,
push the end of the oil drain valve back in and turn
⁄turn to secure it back in place Re-cap the end of
the oil drain valve to keep debris from entering the
drain port.

Pinch the tabs on the oil drain valve, then pull b.
outward to begin draining oil. After the oil has
finished draining, push the end of the oil drain valve
back in, until the tabs click into place. Re-cap the end
of the oil drain valve to keep debris from entering
the drain port.

After the oil has finished draining, push the end of the oil 5.
drain valve back in, until the tabs click into place. Re-cap
the end of the oil drain valve to keep debris from entering
the drain port.

Replace the oil filter as instructed in the Owner’s Manual.6.
Refill the engine with new oil. Refer to the Owner’s Manual 7.

for information regarding the volume and weight of engine
oil.

Spark Plug

The spark plugs should be cleaned and the gap reset once a
season. Refer to the Owner’s Manual for correct plug type and
gap specifications.

Hydrostatic Transmission

The zero turn tractor is equipped with dual integrated
hydrostatic pumps/transaxles that are sealed and are
maintenance-free. Fluid levels cannot be checked and fluid
cannot be added or changed.

General Battery Information

WARNING!

Should battery acid accidentally splatter into •
the eyes or onto the skin, rinse the affected area
immediately with clean cold water. If there is
any further discomfort, seek prompt medical
attention.

If acid spills on clothing, first dilute it with •
clean water, then neutralize with a solution of
ammonia/water or baking soda/water.

NEVER connect (or disconnect) battery charger •
clips to the battery while the charger is turned
on, as it can cause sparks.

Keep all sources of ignition (cigarettes, matches, •
lighters) away from the battery. The gas
generated during charging can be combustible.

As a further precaution, only charge the battery •
in a well ventilated area.

Always shield eyes and protect skin and clothing •
when working near batteries.

Batteries contain sulfuric acid and may emit •
explosive gases. Use extreme caution when
handling batteries. Keep batteries out of the
reach of children.

23Se c t i o n 6 — Ma i n t e n a n c e & ad j u S t M e n t S

Battery Maintenance

Nozzle

Adapter

Adapter

Lock Collar

Pull Lock

Collar Back

Deck Wash Nozzle

The battery is filled with battery acid and then sealed at •
the factory. However, even a “maintenance free” battery
requires some maintenance to ensure its proper life cycle.

Spray the terminals and exposed wire with a battery •
terminal sealer, or coat the terminals with a thin coat of
grease or petroleum jelly, to protect against corrosion.

Always keep the battery cables and terminals clean and •
free of corrosion.

Avoid tipping. Even a sealed battery will leak electrolyte •
when tipped.

WARNING! Batteries contain sulfuric acid and may

emit explosive gases. Use extreme caution when
handling batteries. Keep batteries out of the reach
of children.

Tire Maintenance

Check the tire air pressure after every 50 hours of operation or
weekly. Keep the tires inflated to the recommended pressures.
Improper inflation will shorten the tire service life. See the tire
side wall for proper inflation pressures. Observe the following
guidelines:

Do not inflate a tire above the maximum pressure shown •
on the sidewall of the tire.

Do not reinflate a tire that has been run flat or seriously •
under inflated. Have a qualified tire mechanic inspect and
service the tire.

Lubrication

Using a pressure lubricating gun, lubricate the front castor •
wheel axles and the front pivot axle with grease after every
10 hours of service.

Periodically lubricate all other pivot points with a quality •
lubricating oil.

Using the Deck Wash System

WARNING! When using the deck wash system,

never engage the deck from any position other than
the operator’s seat of the tractor. Do not use an
assistant or engage deck in the presence of any
bystanders.

Attach the nozzle adapter to a standard garden hose connected 1.
to a water supply.

Move the tractor to an area within reach of the hose where the 2.
dispersal of wet grass clippings is not objectionable to you.
Disengage the PTO, engage the parking brake, and stop
the engine.

Pull back the lock collar of the nozzle adapter and push the 3.
adapter onto one of the deck wash nozzles at either end of
the mower deck. Release the lock collar to lock the adapter
on the nozzle. See Fig. 6-2.

Figure 6-2

Turn on the water supply. 4.
From the tractor operator’s seat, start the engine and engage the 5.

PTO. Allow to run as needed. Disengage the PTO and stop
the engine.

Turn off the water supply. 6.
Pull back the lock collar of the nozzle adapter to disconnect the 7.

adapter from the nozzle.
Repeat the previous steps to clean the deck using the nozzle at 8.

the other end of the deck.

Cleaning the Spindle Pulleys

Once a month remove the belt covers to remove any
accumulation of grass clippings from around the spindle pulleys
and V-belt. Clean more often when mowing tall, dry grass.

24 se c t i O n 6— Ma i n t e n a n c e & ad j u s t M e n t s

Using the Transmission Bypass Rods

Pull Out Bypass

Rod Then Lower

Into Slot

Keyhole Slot

RH Transmission

Bypass Rod

If for any reason the tractor will not drive or you wish to move the
tractor, the two hydrostatic transmissions are equipped with a
bypass rod that will allow you to manually move the tractor short
distances.

WARNING! Do not tow the tractor, even with the

bypass rod engaged. Serious transmission damage
will result from doing so.

From just in front of the two rear tires, locate the transmission 1.
bypass rods. Refer to Fig. 6-3.

Recharge the battery before returning to service. Although the 4.
tractor may start, the engine charging system may not fully
recharge the battery.

Tractor Storage

If your tractor is not going to be operated for an extended period
of time (thirty days to approximately six months), the tractor
should be prepared for storage. Store the tractor in a dry and
protected location. If stored outside, cover the tractor (including
the tires) to protect it from the elements. The procedures
outlined below should be performed whenever the tractor is
placed in storage.

Change the engine oil and filter following the instructions 1.
provided in the engine manual packed with this manual.

WARNING! Never store the tractor with fuel in the

tank indoors or in poorly ventilated enclosures,
where fuel fumes may reach an open flame, spark or
pilot light as on a furnace, water heater, clothes
dryer, etc.

If storing the tractor for 30 days or more:2.

To prevent gum deposits from forming inside the a.
engine’s carburetor and causing possible
malfunction of the engine, the fuel system must be
either completely emptied, or the gasoline must be
treated with a stabilizer to prevent deterioration.

WARNING! Fuel left in the fuel tank deteriorates

and will cause serious starting problems.

Figure 6-3

Pull one rod toward the front of the tractor until the flange 2.
on the rod is forward of the keyhole slot in the frame
assembly.

Lower the bypass rod into the keyhole slot and release so the rod 3.
flange is against the front of the frame bracket.

Repeat the above procedure to engage the other bypass rod on 4.
the other side of the tractor.

After moving the tractor, disengage both bypass rods. Lift the 5.
rod and guide the flange of the rod back through the
larger circular opening of the keyhole, then release the rod.

NOTE: The tractor will not drive with the bypass rods in the
engage position.

Battery Storage

When storing the tractor for extended periods, disconnect the 1.
negative battery cable. It is not necessary to remove the
batt ery.

All batteries discharge during storage. Keep the exterior of 2.
the battery clean, especially the top. A dirty battery will
discharge more rapidly.

The battery must be stored with a full charge. A discharged 3.
battery can freeze sooner than a charged battery. A fully
charged battery will store longer in cold temperatures than
hot.

Using a fuel stabilizer:b.

Read the product manufacturer’s instructions •
and recommendations.

Add to clean, fresh gasoline the correct •
amount of stabilizer for the capacity
(approximately 3 gallons) of the fuel system.

Fill the fuel tank with treated fuel and run the •
engine for 2-3 minutes to get stabilized fuel
into the carburetor.

Emptying the fuel system:c.

Prior to putting the tractor in storage, monitor •
fuel consumption with the goal of running
the fuel tank empty.

Run the engine until it begins to stall. Use the •
choke to keep the engine running until all fuel
in the carburetor has been exhausted.

Referring to the engine manual, drain the fuel •

from the carburetor bowl.
Clean the engine and the entire tractor thoroughly.3.
Fully charge the battery, then disconnect the negative cable at 4.

the battery to prevent possible discharge. Recharge the
battery periodically when in storage.

NOTE: Remove the battery if exposed to prolonged periods
of sub-freezing temperatures. Store in a cool, dry location
where temperatures are above freezing.

25se c t i O n 6 — Ma i n t e n a n c e & ad j u s t M e n t s

Control Lever

Pivot Bracket

Flange

Lock Nut

Height

Adjustment

Holes

Shoulder

Screw

Flat Washer

Hex

Screw

Lubricate all lubrication points.5.
NOTE: Use a pressure washer or garden hose is not

recommended to clean your tractor. They may cause
damage to electrical components, spindles, pulleys,
bearings or the engine. The use of water will result in
shortened life and reduce serviceability.

Removing The Tractor From Storage

Check the engine oil.1.
Fully charge the battery and inflate the tires to the 2.

recommended pressure.
If drained before storing, fill the fuel tank with clean, fresh 3.

gasoline.
Add clean, fresh fuel.4.
Start the engine and allow to idle for a few minutes to ensure 5.

engine is operating properly.
Drive the tractor without a load to make certain all the tractor 6.

systems are functioning properly.

Adjustments

Adjusting the Seat

To adjust the position of the seat, pull up and hold the seat
adjustment lever. Slide the seat forward or rearward to the
desired position; then release the adjustment lever. Make sure
seat is locked into position before operating the tractor. See Fig.
6-4.

Figure 6-4

Adjusting RH & LH Drive Control Levers

The RH and LH drive control levers can be adjusted up or down
and fore-and-aft for the comfort of the operator. The drive
control levers can be placed in either of two height positions,
and/or can be moved forward or rearward within the range of
the slot in each control lever mounting bracket.

To adjust the drive control lever height, proceed as follows:

Remove the flange lock nut, flat washer, and hex screw securing 1.
the lever to the pivot bracket.

While supporting the control lever to keep it from falling, 2.
remove the hex insert flange lock nut and shoulder screw
from the bottom of the control lever and pivot bracket.
Refer to Fig. 6-5.

Figure 6-5

Reposition the control lever to align with the other set of holes in 3.
the pivot bracket and insert the shoulder screw removed
earlier. Fasten with the hex insert flange lock nut and
tighten until snug.

Insert the hex screw with washer through the control lever slot 4.
and the pivot bracket. Thread the flange lock nut onto the
screw, but do not tighten now.

If you are going to adjust the control levers forward or rearward, 5.
proceed to the next step. If not, fully tighten the flange lock
nut.

To adjust the drive control levers forward or rearward, proceed as
follows:

If not already loose, loosen the flange lock nut and rotate 1.
the control lever either forward or rearward to the desired
position. See Fig. 6-5.

NOTE: If the control lever is too tight to move, slightly
loosen the hex insert flange lock nut and shoulder screw at
the bottom of the control lever.

Tighten the flange lock nut to fix the control lever in the adjusted 2.
position

Repeat the above procedure to adjust the other control lever into 3.
the same position. Adjust so that both levers are even with
each other when in the neutral position.

26 se c t i O n 6— Ma i n t e n a n c e & ad j u s t M e n t s